PAED-0178

A 1-year old child is brought to the ER with abdominal distension and bilious vomiting. Radiological examination shows distended bowel loops and gas in the rectum. Her mother reveals that the baby had surgery at the two days of age for a twisted intestine. Blood gas analysis from a sample drawn from a capillary shows a pH of 7.34 and lactate of 2. Which of the following is the most appropriate management step?